<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li>
                  <a title="全部" href="#" @click="searchAll()" :class="{active:quanbuindex==true}">全部</a>
                </li>
                <!-- 循环遍历 我们的一级分类 -->
                <li v-for="(item,index) in subjectNestedList" :key="index" :class="{active:oneIndex==index}"> 
                  <a :title="item.title" href="#" @click="searchTwo(item.id,index)">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="(item,index) in subSubjectList" :key="index" :class="{active:twoIndex==index}">
                  <a :title="item.title" href="#" @click="searchOne(item.id,index)">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl">
            <ol class="js-tap clearfix">
              <li :class="{'current bg-orange':buyCountSort!=''}">
                <a title="销量" href="javascript:void(0);" @click="searchBuyCount()">销量
                <span :class="{hide:buyCountSort==''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':gmtCreateSort!=''}">
                <a title="最新" href="javascript:void(0);" @click="searchGmtCreate()">最新
                <span :class="{hide:gmtCreateSort==''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':priceSort!=''}">
                <a title="价格" href="javascript:void(0);" @click="searchPrice()">价格&nbsp;
                  <span :class="{hide:priceSort==''}">↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total == 0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article class="comm-course-list" v-if="data.total > 0">
            <ul class="of" id="bna">
              <li v-for="item in data.items" :key="item.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="item.cover" height="100%" width="100%" class="img-responsive" :alt="item.title">
                    <div class="cc-mask">
                      <a :href="'/course/'+item.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+item.id" :title="item.title" class="course-title fsize18 c-333">{{item.title}}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span v-if="Number(item.price) === 0" class="fr jgTag bg-green">
                      <i class="c-fff fsize12 f-fA">免费</i>
                    </span>
                    <span v-else class="fr jgTag bg-green">
                      <i class="c-fff fsize12 f-fA">{{item.price}}</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                      <i class="c-999 f-fA">9634人学习</i>
                      |
                      <i class="c-999 f-fA">9634评论</i>
                    </span>
                  </section>
                </div>
              </li>
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)">首</a>
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current-1)">&lt;</a>
            <a
              v-for="page in data.pages"
              :key="page"
              :class="{current: data.current == page, undisable: data.current == page}"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current+1)">&gt;</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)">末</a>
            <div class="clear"/>
          </div>
        </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
import course from '@/api/course'

export default {
  data(){
    return {
      page:1,  // 当前页
      data:{}, // 课程列表
      subjectNestedList: [], // 一级分类列表
      subSubjectList: [], // 二级分类列表
      searchObj: {}, // 查询表单对象
      oneIndex:-1,
      twoIndex:-1,
      buyCountSort:"",
      gmtCreateSort:"",
      priceSort:"",
      // 一级分类id
      // subjectParentId:""
      quanbuindex:false
    }
  },
  created(){
    if(this.$route.params && this.$route.params.name){
      this.searchObj.title = this.$route.params.name
    }
    // 课程第一次查询
    this.initCourseFirst()
    // 一级分类的显示
    this.initSubject()
  },
  methods:{
    //1. 查询第一页的数据
    initCourseFirst(){
        course.getCourseList(1,8,this.searchObj).then(resp => {
          // 课程列表
          this.data  = resp.data.data
        })
    },

    // 2.查询所有的分类
    initSubject(){
      course.getAllSubject().then(resp => {
         this.subjectNestedList = resp.data.data.oneSubject

      })
    },

    // 3.分页切换
    gotoPage(page){
      if(page > this.data.pages){
          page = this.data.pages
        }
      course.getCourseList(page,8,this.searchObj).then(resp => {
          // 课程列表
          this.data  = resp.data.data
      })
    },
  
  // 4.点击某个以及分类，查询对对应的二级分类
  searchTwo(subjectParentId,index){
     // 把全部的给关闭
      this.quanbuindex = false
      // 把我们传递过来的index赋值给oneIndex 来使我们样式生效
      this.oneIndex = index
      this.twoIndex = 'dwadwa'
      // 把一级分类点击的id值，赋值给searchObj
      this.searchObj.subjectParentId = subjectParentId
      this.searchObj.subjectId = ''
      // 点击某个二级分类，赋值给searchObj
      // this.searchObj.s
      // 点击某个一级分类进行条件查询
      this.gotoPage(1)
      for(let i = 0; i < this.subjectNestedList.length; i++){
        var subjectList = this.subjectNestedList[i]
        if(subjectList.id == subjectParentId){
          this.subSubjectList = subjectList.children
        }
      }
  },
  // 点击某个二级分类实现查询
  searchOne(subjectId,index){
      // 把我们传递过来的index赋值给twoIndex 来使我们样式生效
      this.twoIndex = index
      this.searchObj.subjectId = subjectId
      // 点击某个二级分类进行条件查询
      this.gotoPage(1)
  },

  // 5.查询全部
  searchAll(){
    // 将其他的不变颜色
    this.oneIndex = 'dwadw'
    this.twoIndex = 'dwadwa'
    this.quanbuindex = true
    this.subSubjectList = []
    // 重新查询
    this.searchObj = {}
    this.gotoPage(1)
  },

  // 6.选取排序
      //购买量查询
      searchBuyCount() {
      this.buyCountSort = "1";
      this.gmtCreateSort = "";
      this.priceSort = "";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },
    //更新时间查询
    searchGmtCreate() {
      debugger
      this.buyCountSort = "";
      this.gmtCreateSort = "1";
      this.priceSort = "";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },
    //价格查询
    searchPrice() {
      this.buyCountSort = "";
      this.gmtCreateSort = "";
      this.priceSort = "1";
      this.searchObj.buyCountSort = this.buyCountSort;
      this.searchObj.gmtCreateSort = this.gmtCreateSort;
      this.searchObj.priceSort = this.priceSort;
      this.gotoPage(this.page)
    },

}

};
</script>
<style scoped>
  .undisable{
    pointer-events: none
  }
  .active {
    background: #bdbdbd;
  }
  .hide {
    display: none;
  }
  .show {
    display: block;
  }
</style>